Knotter



' S. F. BROWN.

KNOTTER.

APPLICATION FILED MAY 15, I919.

Patented Aug. 17

Aitys.

SHEPHERD F. BROWN, OF MALDEN, .MAS S AGHUSETTS.

Specification of Letters Patent. Patented A11 1'7, 1920.

Application filed May -15, 1919. Serial No. 297,241.

To all whom it may concern:

Be it known that I, SHEPHERD F. BROWN, a citizen oi. the United States, residing at ldalden county of Middlesex, State of lwl assachusetts, have .invented an Improve ment in Knotters, of which the following description, in connection with the accompanying drawing, is a specification, 11l e cl'laracters on the drawing representing like parts; i

This invention relates to improvements in knotters for tying together two or more strands of yarn, and the ob ect thereoi 18 to provide a simplified and effective form oi knotter.

I am aware that various knotters have been produced for the purpose o'l tying together strands of yarn but such knottcrs with which I am familiar are complicated in construction and expensive to manufacture.

The principal object of the present invention is to produce a simple and efl'ective knotter which can be manufactured at a relatively low cost.

A further object of the invention is to provide means whereby the knot may be tied at a predetermined distance from the ends of the yarn and the free ends severed. close to the knot.

Other objects and features of the invention will morefully appear from the following description and accompanying drawingand will be pointed out in the annexed claims.

The drawings illustrate a. preferred embodiment of myinvention in which- Figure 1 is a side elevation of the knotter showing the mechanism for forming the knot Fig. 2 is withits rigid handle preferably formed integral therewith,

Fig. 3 .is an enlarged detail view of cer tain members of the knottcr showing the parallel. strands in the position when first presented to the knotter,

Fig. 1 is a similar view showing, the position of the parts of the knotter when the loop is about to be completed and before the strands are clamped and out, j

Fig. 5 is a detail view of the form of knot which istied by the knotter.

The invention is illustrated applied to a hand knotter to be carried upon the left of theoperatom but it will be under an end view showing the frame stood that the same may be constructed to be carried upon the right hand of the operwithin the spirit and meaning of the annexed claims.

The particular embodiment oi? the inven .tion disclosed herein comprises a frame which preferably is in form of a plate 1 upon which the knotting mechanism is mounted, said platepre'ferably having an integral extension 52 positioned at right angles thereto and forming a guide for a sliding cam and a handle member 3 ol? loop form extending downwardly from the member 1, thence bent upwardly to present a straight portion at to inclose the hand of the operator, and finally again bent over and downwardly to provide a portion which may be attached to the body portion 1. The body portion 1 may also be pro vided with an integral tapering clamping member or plate 6 upon which a cutting plate 7 of any desirable form may be secured, the edges of the cutting and clamping members being parallel and closely ad- -jacent to each other. Cooperating cutting and clamping members are connected to the frame 1.

As illustrated herein the cutting member comprises a scissor or shear plate 8 which is pivotally mounted upon a stud 9 and has an operating extension 10 connected to a spring 11.]. which normally tends to hold the movable cutting plate 8 away from the stationary cutting plate 7. The movable c1amping member comprises a resilient wire 12 which crosses the point of the movable cut ting member 8 and is secured to said movable cutting member to move therewith. In the present instance the wire 12 has a portion 13 which is carried from beneath the cutting blade up over the pivot and is secured to the extension 10 oi? the movable cutter. The 1110 able cutting and clamping members 8 and 12 are so positioned that when the strandsof yarn are carried between them and the members closed upon their respective cooperating stationary members the strands of yarn which are passed between them will be first clamped. and then severed.

In order to form a knot a combined reciprocating and rotating loopcr is provided. This looper comprises a hook-shaped member 14 upon the end of the Ueshaped arm of the. frame.

15 which is secured to the end 16 of a cylindrlcal looper stem 17. The looper stem ll 'is mounted in a bearing 18 carried by a bracket- 19 suitably secured to the body 1 The looper stem 17 is 'slid ably and rotatably mounted in its bearing and means are provided for imparting to said looper stem {r combined re:-iprocating and rotary movement. The reciprocating .movement is preferably imparted to it by a sliding cam QOwhile the rotary movement is effected lv a )in 21 secured to the looper stem 17 which is guided ina cam slot 22 of the bearnn 18. The end of the loo :er

stem 11 is normady mamtamed in contact 'with the cam 20 by a helical spring 23 which abuts at one end against the beariug 18 and engages a pin 24 near the end of the looper stem. A guard in the form of a flat plate pivotally mount d upon a stud 26 preferably is imposed. between the end of thelooper stem and the cam in order to give an extended bearing for the cam and to more effectively actuate the looper.

The cam 20, as illustrated herein, is carried by or formed integral with the edge portion ofthe plate 27 which is slidably mounted in a guide way 28 in the offset portion 2' of the mam frame. At itsupper end the cam plate 27 has an extension 29 which is secured to an actuator slide 00 ha ving a lateral extension 35!. adapted to be portion 2 of the frame. The actuator 30 also has a shoulder 35 which is adapted, when said actuator is depressed to the predetermined point, to engage the end of the extension 10 of the movable cutter member and upon further reciprocation to actuate said cutter member.

In the operation of the device the parallel strands 36 and 37 to 'be tied together are presented to the looper 1.4 and carried thence up over the rigid clamping and cutting members 6, 7 to'form a bight 38. The

parallel strands are then dropped down a-vardly alongside the clamping and cutting members to form downwardly extending leads 39 and i0 somewhat nearer the end of the clamping and cutting members than the leads '36, 37 which" are engaged by the looper. l/Vith the strands in this position the operator presses upon the thumb piece 3l'causing the looper first to be rotated as the pin 21 travels in the initial portion of the cam slot. Upon further depression of the thumb member 31 the looper is morcd longitudinally by the cam 20 until the pin 21. reaches the terminal curved portion of the cam slot 22. Upon further advancing movement of the looper it is again rotated and this time carries' the leads 36, 37 with the strands across the leads Ill), ll) of said strands and into the path of the movable clamping and cutting members. In the meantime the shoulder 3.3 upon lhc actuator Ell) engages the extension ll) of the pivoted cutting member and causes the same to close upon the st rands which are in its path and carry them into engagcmcnt with the stationary clamping and cutting members. Inasmuch as the end l2 ol' the tlllllll ing member is positioned in advance ol' the cutting edge the strands 36, 5? ol' the loop will be clamped before the cutter engages the same. After these strands 36. have been clamped the cutter severs the free ends. The tension then applied by the hand of the operator to the loads 39, lo will cause the loop which is formed around the ends of the clamping and cutting members to slip oll' over their points so that a lrnot illustrated in Fig. 5 will be tied to unite said slramls.

By reason of this construction the knot can be formed a short distance from the ends of the cords since the operator merely has to bring the ends together and lay them across the stationary cutting and clamping members and bring the ends down to a sullicient distance to permit the proper engagement and depression of the looper. This will result in the saving of a large amount of yarn, for frequently the operators are careless in tying the knots and leave a long flowing end beyond the knot. Furthermore, by severing the loose ends closely adjacent to the line all danger is avoided of interfering with the proper operation of the machinery which subsequently operates upon the yarn, and the necessity of clipping the ends during a subsequent operation such as weaving is avoided.

It will be understood that the embodiment of my invention disclosed herein is of an illustrative character and is not restrictive and that various changes may be made within the spirit and scope of the following claims.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A knotter comprising a frame having a rigid clamping and cutting member adapted to form and support the bight of pa rallcl strands of yarn to be tied, cooperating clamping and cutting members movable relatively thereto, a looper, means for imparting to said looper a combined rotary and longitudinal movement acting to cause said looper to engage one lead of the parallel strands, carry the same across the other lead and into the path of the movable clamping and cutting members to form the knot loop, and means for actuating saidmovable members to cause the same to cut said strands and to hold the ends thereof adjacent the loop While the loop is tightened to form a knot by tension applied to the parallel strands.

2. A knotter comprising a frame having a rigid clamping and cutting member adapt ed to form and support the bight of the parallel strands of yarn to be tied, cooperating clamping and cutting-members movable relatively thereto, rotatable and reciprocable looper normally positioned to engage one lead 01 the parallel strands, a sliding cam engaging the end of the looper stem and operable to reciprocate said looper, means for intermittently rotating said looper during its reciprocating movement to cause said looper to carry the engaged lead of parallel strands across the other lead and into the paths of the movable clamping and cutting members to form the knot loop, and means for actuating said movable members to cause the same to out said strands and hold the ends adjacent the loop While the latter is tightened to form a knot by tension applied to the parallel strands.

3. A knotter comprising a frame having a rigid clamping and cutting member adapted to form and support the bight of parallel strands of yarn to be tied, cooperating clamping and cutting members movable relatively thereto, a rotatable and reciprocable looper positioned normally to engage one lead of said parallel strands, a sliding cam operable to engage the end of the looper stem and reciprocate said looper longitudinally, means for intermittently rotating said looper during its reciprocating movement, including a pin on the stem of said looper and a cooperating cam designed to cause said looper to carry the engaged lead across the other lead of parallel strands into the path of the movable clamping and cutting members to form the knot loop, and means operable in conjunction With said sliding cam to cause said movable clamping and cutti131g members to out said. strands and hold the ends adjacent the loop While the latter is tightened to form a knot by tension applied to the parallel strands.

4;. A hand knotter comprising a plate having a handle and provided With a rigid clamping and cutting member adapted to form and support a bight in theparallel strands of yarn to be tied, cooperating clamping and cutting members movable relatively thereto, a looper slidably and rotatably mounted upon said plate, means for imparting to said looper the combined rotary and longitudinal movement to cause said looper to engage one lead of said parallel strands and carry the same across the other lead and into the paths of the movable clamping and cutting members to form a knot loop, and means for actuating said movable members to cause the same to out said strands and hold the ends adjacent the loop while the latter is tightened to form a knot by tension applied to the parallel strands.

.7. A hand knotter comprising a plate having a rigid handle and a rigid clamping and cutting member adaptedto form and support the bight oi? parallel strands of yarn to be tied, pivotally mounted clamping and cutting members, a looper slidably mounted upon said plate, a hand operated cam engaging the stem of said looper and con- .nccted to reciprocate the same, means for rotating said looper during its reciprocating movement to cause said looper to engage one lead of the parallel strands and carry the same across the other lead and into the paths of the movable clamping and cutting members, and means connected to said cam positioned to engage and actuate said clamping and cutting members.

6. A hand knotter comprising a plate having a rigid handle and a rigid clamping and cutting member adapted to form and support the bight ofparallel strands of yarn to be tied, pivotally mounted clamping and cutting members, a looper bearing carried by said plate having a cam slot therein, a looper slidably mounted in said bearing, a pin in said looper engaging said slot and operable upon the reciprocation of said looper stem to impart an intermittent rotary movement to said looper, a sliding actuator adapted to be engaged by the thumb of the operator, a cam connected to said actuator engaging the end of the looper stem and adapted to reciprocate said looper, whereby the combined rotating and reciprocating movement oi said looper Will carry one of the leads of the parallel strands across the other lead and into the path of the movable clamping and cutting members, and means carried by said actuator positioned to engage and actuate said movable clamping and cutting members to cause the same to cut said strands and hold the ends adjacent the loop while the latter is tightened to form a knot by tension applied to the parallel strands.

In testimony whereof, I have signed my name to this specification.

SHEPHERD F. BROWN. 

